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This commit is contained in:
Emil
2023-08-04 11:49:03 -06:00
parent f5f14dca06
commit 51322bf512
36 changed files with 6553 additions and 6553 deletions

174
src/mypopen.c

@ -35,11 +35,11 @@
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "global.h" /* pid_t, shell, and basename() */
#include "global.h" /* pid_t, shell, and basename() */
#define tst(a,b) (*mode == 'r'? (b) : (a))
#define RDR 0
#define WTR 1
#define tst(a,b) (*mode == 'r'? (b) : (a))
#define RDR 0
#define WTR 1
/* HBB 20010312: make this a bit safer --- don't blindly assume it's 1 */
#ifdef FD_CLOEXEC
@ -49,7 +49,7 @@
#endif
#ifdef HAVE_IO_H
# include <io.h> /* for setmode() */
# include <io.h> /* for setmode() */
#endif
static pid_t popen_pid[20];
@ -66,34 +66,34 @@ myopen(char *path, int flag, int mode)
* mode for files in "binary mounted" paths */
#if O_BINARY != O_TEXT
if (! (flag | O_BINARY))
flag |= O_TEXT;
flag |= O_TEXT;
#endif
if(mode)
fd = open(path, flag, mode);
fd = open(path, flag, mode);
else
fd = open(path, flag);
fd = open(path, flag);
#ifdef __DJGPP__ /* FIXME: test feature, not platform */
#ifdef __DJGPP__ /* FIXME: test feature, not platform */
/* HBB 20010312: DOS GCC doesn't have FD_CLOEXEC (yet), so it
* always fails this call. Have to skip that step */
if(fd != -1)
return(fd);
return(fd);
#endif
if(fd != -1 && (fcntl(fd, F_SETFD, CLOSE_ON_EXEC) != -1))
return(fd);
return(fd);
else
{
/* Ensure that if the fcntl fails and fd is valid, then
the file is closed properly. In general this should
not happen. */
if (fd != -1)
{
close (fd);
}
{
/* Ensure that if the fcntl fails and fd is valid, then
the file is closed properly. In general this should
not happen. */
if (fd != -1)
{
close (fd);
}
return(-1);
}
return(-1);
}
}
FILE *
@ -106,70 +106,70 @@ myfopen(char *path, char *mode)
#ifdef SETMODE
if (fp && ! strchr(mode, 'b')) {
SETMODE(fileno(fp), O_TEXT);
SETMODE(fileno(fp), O_TEXT);
}
#endif /* SETMODE */
#ifdef __DJGPP__ /* FIXME: test feature, not platform */
/* HBB 20010312: DOS GCC doesn't have FD_CLOEXEC (yet), so it
* always fails this call. Have to skip that step */
if(fp)
#else
if(fp && (fcntl(fileno(fp), F_SETFD, CLOSE_ON_EXEC) != -1))
if(fp && (fcntl(fileno(fp), F_SETFD, CLOSE_ON_EXEC) != -1))
#endif
return(fp);
return(fp);
else {
if (fp)
fclose(fp);
return(NULL);
}
else {
if (fp)
fclose(fp);
return(NULL);
}
}
FILE *
mypopen(char *cmd, char *mode)
{
#ifdef __DJGPP__
/* HBB 20010312: Has its own implementation of popen(), which
* is better suited to the platform than cscope's */
return (popen)(cmd, mode);
/* HBB 20010312: Has its own implementation of popen(), which
* is better suited to the platform than cscope's */
return (popen)(cmd, mode);
#else
int p[2];
pid_t *poptr;
int myside, yourside;
pid_t pid;
int p[2];
pid_t *poptr;
int myside, yourside;
pid_t pid;
if(pipe(p) < 0)
return(NULL);
myside = tst(p[WTR], p[RDR]);
yourside = tst(p[RDR], p[WTR]);
if((pid = fork()) == 0) {
/* myside and yourside reverse roles in child */
int stdio;
if(pipe(p) < 0)
return(NULL);
myside = tst(p[WTR], p[RDR]);
yourside = tst(p[RDR], p[WTR]);
if((pid = fork()) == 0) {
/* myside and yourside reverse roles in child */
int stdio;
/* close all pipes from other popen's */
for (poptr = popen_pid; poptr < popen_pid+20; poptr++) {
if(*poptr)
(void) close(poptr - popen_pid);
}
stdio = tst(0, 1);
close(myside);
close(stdio);
/* close all pipes from other popen's */
for (poptr = popen_pid; poptr < popen_pid+20; poptr++) {
if(*poptr)
(void) close(poptr - popen_pid);
}
stdio = tst(0, 1);
close(myside);
close(stdio);
#if V9
dup2(yourside, stdio);
dup2(yourside, stdio);
#else
fcntl(yourside, F_DUPFD, stdio);
fcntl(yourside, F_DUPFD, stdio);
#endif
close(yourside);
execlp(shell, basename(shell), "-c", cmd, (void *)0);
_exit(1);
} else if (pid > 0)
tstat = signal(SIGTSTP, SIG_DFL);
if(pid == -1)
return(NULL);
popen_pid[myside] = pid;
(void) close(yourside);
return(fdopen(myside, mode));
close(yourside);
execlp(shell, basename(shell), "-c", cmd, (void *)0);
_exit(1);
} else if (pid > 0)
tstat = signal(SIGTSTP, SIG_DFL);
if(pid == -1)
return(NULL);
popen_pid[myside] = pid;
(void) close(yourside);
return(fdopen(myside, mode));
#endif /* DJGPP */
}
@ -179,30 +179,30 @@ int
mypclose(FILE *ptr)
{
#ifdef __DJGPP__
/* HBB 20010705: This system has its own pclose(), which we
* don't want to replace */
return (pclose)(ptr);
/* HBB 20010705: This system has its own pclose(), which we
* don't want to replace */
return (pclose)(ptr);
#else
int f;
pid_t r;
int status = -1;
sighandler_t hstat, istat, qstat;
int f;
pid_t r;
int status = -1;
sighandler_t hstat, istat, qstat;
f = fileno(ptr);
(void) fclose(ptr);
istat = signal(SIGINT, SIG_IGN);
qstat = signal(SIGQUIT, SIG_IGN);
hstat = signal(SIGHUP, SIG_IGN);
while((r = wait(&status)) != popen_pid[f] && r != -1)
; /* nothing */
if(r == -1)
status = -1;
(void) signal(SIGINT, istat);
(void) signal(SIGQUIT, qstat);
(void) signal(SIGHUP, hstat);
(void) signal(SIGTSTP, tstat);
/* mark this pipe closed */
popen_pid[f] = 0;
return(status);
f = fileno(ptr);
(void) fclose(ptr);
istat = signal(SIGINT, SIG_IGN);
qstat = signal(SIGQUIT, SIG_IGN);
hstat = signal(SIGHUP, SIG_IGN);
while((r = wait(&status)) != popen_pid[f] && r != -1)
; /* nothing */
if(r == -1)
status = -1;
(void) signal(SIGINT, istat);
(void) signal(SIGQUIT, qstat);
(void) signal(SIGHUP, hstat);
(void) signal(SIGTSTP, tstat);
/* mark this pipe closed */
popen_pid[f] = 0;
return(status);
#endif /* DJGPP */
}